The announcement message included a request for feedback
from the community, and particularly suggestions for suitable test cases:

"We strongly encourage SVG developers to test it against your own SVG. Now that there is such a healthy
community of people developing a wide range of content, it is becoming more difficult for us to create our own test cases for every possible circumstance, duplicate every environment, etc. so we welcome your feedback and test cases
when content does not display as you expect it to. Test cases are always helpful."

The announcement indicates that additional releases will be made over the next few months.